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An energy management system for stand-alone microgrid consisting of a wind turbine (WT) generator, a diesel generator, an energy storage system (ESS), and a sea water desalination system is proposed in this paper. The coordinated control of the distributed generations and ESS is researched with two operation modes. Then, a real-time rolling horizon energy management method is presented based on hour-ahead...
This paper proposes a coordinated control method of the diesel generators (DGs) and battery storage system (BSS) in AC island microgrid. When the DGs run as the main power source, an auxiliary power control signal is added to the conventional droop control for BSS to prevent system collapses caused by long-time over-current of the DGs, which can improve the stability of the microgrid. To avoid short-term...
Considering the operation constraints of main equipments, this paper addresses an optimization design and coordinated operation control strategy for an islanded microgrid including wind generator, photovoltaic, diesel generator and energy storage (Wind-PV-DG-ESS). The primary design objectives of this strategy are: (i) to guarantee the long-term operation stability of the islanded microgrid; (ii)...
A multi-scenario, multi-objective optimization method of a grid-parallel Microgrid (MG) is presented aiming for more comprehensive and accurate assessment of a grid-parallel MG. First, different operational modes of a grid-parallel MG are analyzed and sorted. Normally, the MG will connect with the energy deliver system most of the time, providing functions such as peak shaving, system reserve. But...
In the design of one diesel generator unit under pulsed load, variable inertia flywheel(VIF) substitutes for traditional fixed inertia flywheel(FIF). On the basis of FIF's successful design and test in one diesel generator unit under pulsed load, the application of VIF in diesel generator unit under pulsed load is studied deeply. The VIF's inertia calculation method is introduced based on the coupled...
Dual mode running characters and grid-connected technology with two different structured micro turbines (MT) are compared and analyzed respectively in this paper. Firstly, the operating modes of MT are introduced briefly. Then operating characters and influence on traditional system protection are analyzed while MTs are connecting to the grid. The different dual mode schemes are compared via simulating...
A micro-grid can increase the reliability of energy supplies by disconnecting from the grid in the case of network faults or reduced power quality. The techniques that have been investigated to control micro-grids in both modes are summarized as well as those proposed to maintain stability during the transitions from one mode to the other. This paper first introduces the micro-grid planning structure...
Based on constructing different types of distributed generations and energy storage equipments, this paper simulated the dynamical characteristics of MicroGrid with several operating modes under peer to peer control strategy. Two cases were used to analyze the role of storage equipment in MicroGrid. If micro turbine generation with traditional synchronization generator was used in MicroGrid as the...
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